.
Thread 2 (LWP 1448):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:225
No locals.
#1  0x00007f5f17493875 in rtSemEventMultiPosixWaitTimed(RTSEMEVENTMULTIINTERNAL*, unsigned int, unsigned long, RTLOCKVALSRCPOS const*) [clone .isra.1] () from /tmp/apport_sandbox_ArcGWI/usr/lib/x86_64-linux-gnu/dri/vboxvideo_dri.so
No symbol table info available.
#2  0x00007f5f1748edcd in RTThreadUserWait () from /tmp/apport_sandbox_ArcGWI/usr/lib/x86_64-linux-gnu/dri/vboxvideo_dri.so
No symbol table info available.
#3  0x00007f5f1746e688 in stubInitLocked () from /tmp/apport_sandbox_ArcGWI/usr/lib/x86_64-linux-gnu/dri/vboxvideo_dri.so
No symbol table info available.
#4  0x00007f5f1746e819 in stubInit () from /tmp/apport_sandbox_ArcGWI/usr/lib/x86_64-linux-gnu/dri/vboxvideo_dri.so
No symbol table info available.
#5  0x00007f5f1745c7d2 in vbox_install_into_mesa () from /tmp/apport_sandbox_ArcGWI/usr/lib/x86_64-linux-gnu/dri/vboxvideo_dri.so
No symbol table info available.
#6  0x00007f5f1ad4e48a in ?? ()
No symbol table info available.
#7  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 1 (LWP 1452):
#0  0x00007f5f16d7b4a0 in ?? ()
No symbol table info available.
#1  0x0000000002697680 in ?? ()
No symbol table info available.
#2  0x0000000002697f60 in ?? ()
No symbol table info available.
#3  0x00007f5f15b7bea0 in ?? ()
No symbol table info available.
#4  0x00007f5f1746d9a5 in stubSyncThreadProc () from /tmp/apport_sandbox_ArcGWI/usr/lib/x86_64-linux-gnu/dri/vboxvideo_dri.so
No symbol table info available.
Backtrace stopped: frame did not save the PC